2019 LEXUS RX450H wheel torque

2194-1. Before driving
4
Driving
RX450h_RX450hL_U
NOTICE
■When driving the vehicle
●Do not depress the accelerator and brake pedals at the same time during driving, as
this may restrain driving torque.
●Do not use the accelerator pedal or depress the accelerator and brake pedals at the
same time to hold the vehicle on a hill.
■When parking the vehicle
Always set the parking brake and shift the shift lever to P. Failure to do so may cause the
vehicle to move or the vehicle may accelerate suddenly if the accelerator pedal is acci-
dentally depressed.
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in either direction and hold it there for an
extended period of time.
Doing so may damage the power steering motor.
●When driving over bumps on the road, drive as slowly as possible to avoid damaging
the wheels, underside of the vehicle, etc.
■If you get a flat tire while driving
A flat or damaged tire may cause the following situations . Hold the steering wheel
firmly and gradually depress the brake pedal to slow down the vehicle.
●It may be difficult to control your vehicle.
●The vehicle will make abnormal sounds or vibrations.
●The vehicle will lean abnormally.
Information on what to do in case of a flat tire ( P. 673)
■When encountering flooded roads
Do not drive on a road that has flooded after heavy rain, etc. Doing so may cause the
following serious damage to the vehicle:
●Engine stalling
●Short in electrical components
●Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be sure to have
your Lexus dealer check the following:
●Brake function
●Changes in quantity and quality of oil and fluid used for the engine, hybrid transmis-
sion, rear differential, etc.
●Lubricant condition for the bearings and su spension joints (where possible), and the
function of all joints, bearings, etc.

3824-5. Using the driving support systems
RX450h_RX450hL_U
◆ECB (Electronically Controlled Brake System)
The electronically controlled system generates braking force corresponding
to the brake operation
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the br akes are applied suddenly, or if the
brakes are applied while drivin g on a slippery road surface
◆Brake assist
Generates an increased level of br aking force after the brake pedal is
depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to contro l skidding when swerving suddenly or turning on
slippery road surfaces.
◆Enhanced VSC (Enhanced Vehicle Stability Control)
Provides cooperative control of the ABS, TRAC, VSC and EPS.
Helps to maintain directional stability when swerving on slippery road sur-
faces by controlling steering performance.
◆Trailer Sway Control (if equipped)
Helps the driver to control trailer sway by selectively applying brake pressure
for individual wheels and reducing dr iving torque when trailer sway is
detected.
◆TRAC (Traction Control)
Helps to maintain drive power and pr event the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
◆Hill-start assist control
Helps to reduce the backward movement of the vehicle when starting on an
uphill
Driving assist systems
To keep driving safety and performance, the following systems operate auto-
matically in response to various drivin g situations. Be aware, however, that
these systems are supplementary and shou ld not be relied upon too heavily
when operating the vehicle.

6778-2. Steps to take in an emergency
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When trouble arises
RX450h_RX450hL_U
When replacing tires on a vehicle with wheel lock nuts, use the following proce-
dures to remove and install the wheel lock nuts. The wheel lock key is stored in
the tray inside the luggage compartment. Always return the wheel lock key to its
original position after use, so that it does not get lost.
■Removal
For ease of removal, the wheel lock nut should always be the first one loos-
ened.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, loosen the wheel lock nut.
■Installation
For ease of installation, the wheel lock nut should always be the last one tight-
ened.
By hand, install a wheel lock nut on each wheel.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, tighten the wheel lock nut to the recommended
torque.
Wheel lock nut (if equipped)
NOTICE
Do not use an impact wrench. Using an impact wrench may cause permanent damage
to wheel lock nut and wheel lock key. If in doubt about wheel lock application, contact
your Lexus dealer.
1
2
1
2
3

6838-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
WARNING
■When holding a tire with Selectable Color Trim (if equipped)
■Replacing a flat tire
●Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes will
be extremely hot. Touching these areas with hands, feet or other body parts while
changing a tire, etc. may result in burns.
●Failure to follow these precautions could cau se the wheel nuts to loosen and the tire
to fall off, resulting in death or serious injury.
• Never use oil or grease on the wheel bolts or wheel nuts. Oil and grease may cause the wheel nuts to be excessively tightened, leading to
bolt or disc wheel damage. In addition, the oil or grease can cause the wheel nuts
to loosen and the wheel may fall off, causing a serious accident.
Remove any oil or grease from the wheel bolts or wheel nuts.
• Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m, 10.5 kgf•m) as soon as possible after changing wheels.
• When installing a tire, only use wheel nuts that have been specifically designed for
that wheel.
• If there are any cracks or deformations in the bolt screws, nut threads or bolt holes
of the wheel, have the vehicle inspected by your Lexus dealer.
●Observe the following precautions. (RX450hL)
Failure to do so may result in serious injury:
• Do not try to remove the wheel ornament by hand. Take due care in handling the ornament to avoid unexpected personal injury.
• Lower the spare tire completely to the ground before removing it from under the
vehicle.
■Replacing a flat tire for vehicles with power back door
In cases such as when replacing tires, make sure to turn off the power back door main
switch ( P. 112). Failure to do so may cause the back door to operate unintentionally if
the power back door switch is accidentally touched, re sulting in hands and fingers
being caught and injured.
Do not hold the tire by the Selectable Color
Trim. Otherwise, the Selectable Color Trim
may be damaged or may fall off causing the tire
to drop, possibly causing injury.

6848-2. Steps to take in an emergency
RX450h_RX450hL_U
Remove any dirt or foreign matter
from the wheel contact surface.
If foreign matter is on the wheel contact
surface, the wheel nuts may loosen
while the vehicle is in motion, causing
the tire to come off.
Install the spare tire and loosely
tighten each wheel nut by hand by
approximately the same amount.
Tighten the wheel nuts until the tapered
portion comes into loose contact with
the disc wheel seat.
Lower the vehicle.
Firmly tighten each wheel nut two or
three times in the order shown in the
illustration.
For vehicles with wheel lock nuts,
tighten the wheel lock nut last
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
RX450h: Stow the flat tire, tire jack and all tools.
RX450hL:  P. 685
Installing the spare tire
1
Disc wheel
seat
Tapered portion2
3
4
5

7179-1. Specifications
9
Vehicle specifications
RX450h_RX450hL_U
Type A
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size235/65R18 106V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front tire33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Rear tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)Spare tire
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 5 psi (30 kPa, 0.3 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
Wheel size18  8 J, 18  4 T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

7189-1. Specifications
RX450h_RX450hL_U
Type B
Tire size235/55R20 102V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
RX450h:
Front tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)Rear tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Spare tire60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 11 psi (70 kPa, 0.7 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
RX450hL:
Front tire
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear tire35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Spare tire
60 psi (420 kPa, 4.2 kgf/cm2 or bar)Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 9 psi (62 kPa, 0.6 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
Wheel size20  8 J, 18  4 T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)